Car bolster



Sept. l, 1923.

F. W. CHRISWELL CAR BOLSTER Filed July 17. 1922 Patented Sept. 1l, 1923.

UNITED STATES FREDERICK W. CHRISV ELL, OF SEATTLE,

WASHINGTON, ASSIC-NOR TO PACIFIC CAR AND FOUNDRY COMPANY, OF SEATTLE, WASHINGTON, A CORPORATION OF WASH- INGTON.

CAR BOLSTER.

Application filed July 17, 1922. Serial No. 575,528.

To all whom t may concern.'

Be it known that I, FREDERICK IV. CHRIS- wnLL.I a citizen of the United States of America, and resident of the city of Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Car Bolsters, of which the following is a specification.

My present invention is an improvement in car bolsters of a type which are designed for use in conjunction with bunks of a special type, to form an eiiicient and unusually strong and rugged log carrying means for cars.

The object of my invention is to form a strong and rugged log supporting and carrying means for cars. The novel features upon which patent protection is desired will be hereinafter described and particularly pointed out in the claims.

Figure 1 is a top plan view of a bunk and bolster of my improved construction, one end of the bunk being broken away. y

Figure 2 is an end view of a truck and side elevation of a bolster and bunk, one side of the figure showing these parts in section. j

Figure 3 is a transverse section on line 3-3 of Figure 2. j

As the novel features which comprise my invention are confined to the bolster and to the combination of the bolsterv with the bunk and of these parts with the longitudinal beams of acarbody, I will not particularly describe the truck construction. The

latter may be anything which accommodates itself to a suitable combination with the special type of bolster herein described and claimed. The truck has its part 1 of a center bearing, this cooperating with a complemental part 10 of the central member 2 of the bolster. A king pin 11 is also employed. These parts may be of any acceptable construction.

The truck also has its part 12 of side bearings. The central beam 2 of the bolster is of a length to carry the complemental upper part 13 of the side hearing.

Bracket extensions 3 are secured to the outer ends of the bolster 2. The manner of securing is such as to make a rm and rigid combination. Liberal flat under surfaces 30 at the inner end of the bracket extensions are securely bolted or riveted to the outer part of the upper surface of the bolster 2 transverse rib 31 abutting against the ends of the bolster 2 serve to position the two parts and to assist in taking the inward end thrust of the bracket extensions.

The inner end faces of the bracket extensions stop at such a distance from the center as to form between thema space in which to accommodate the central sills 4 which serve as the backbone connecting the two trucks. The depth of the bracket extensions 3 also conforms to the depth of thc sills which are to be employed for this purpose.

At its outer end each bracket extension is provided with a recess having two faces at right angles forming a ledge or projecting arm 32 upon which is placed the outer or side sills 40. This recess is of a size to just accommodate the transverse section of such sills. The bracket extensions are also shown as provided with recesses 33 in their upper edge, of which two are shown for each bracket section, one located just inside of the sill-receiving recess at the outer end of the extension andthe other just outwardly of its inner end. These are designed for receiving truss rods.

. Both the bolster 2 and the bracket extensions 3 are provided upon the sill sustaining upper surfaces with ribs as 34k which extend lengthwise of the extension and transversely of the sills 1 and 40 which are carried ther-eon. The purpose of these is to form a locking tie against longitudinal movement of the sills 4 and 40 which sills are for this purpose grooved so as to form a channel which closely fits the ribs. 34.

In conjunction with the bolster as above described, is employed a bunk 5. This bunk is of metal construction. It may be of any suitable type of bunk structure of which a number are on the market. This rests upon the upper surface of the two extension brackets 3 to which it is secured by rivets or bolts so that the bunk forms a tension member and the bolster sections together form a strong and rigid compression member of a truss capable of resisting extremely hard blows and heavy weights. As the particular structure of the bunk is immaterial to my invention I have not illustrated this in detail nor here described the same any more than that it has a metal frame extending integrally throughout its entire length. The above construction of bolster and bunk has been found excellently adapted to the rough use to which it is subjected when used for carrying logs. By extending the bolster section 2 so as to form the upper half lof the side bearings thereon. it has been possible to make the whole device more rigid.

The bunk forms an upper or tension menaber of a truss of which the bolster 2 and the bracket extensions 3 are the compression members. These parts are strongly bolted or riveted together to forni an unusually strong and rugged truss capable of sustaining the blows and strains incidental to loading and hauling heavy logs. They are also proportioned to forin recesses which snugly receive and securely hold the car sills.

What I claim as my invention is:

l. An extension bracket for car bolsters having a level top for the body thereof adapted to serve as a support for a bunk, an inner end portion thereof having a vertical thickness corresponding to the vertical depth of a car sill and adapted to rest upon and be secured to the outer end of the car bolster7 the bracket body extending outwardly of the bolster end and a side-sill supporting arm extending from the outer end of the bracket body at the lower side thereof.

2. An extensionbracket for car bolsters havin@ a level top for the body thereof adapted to serve as al support for a bunk,

`the inner end section thereof having a vertical thickness correspondingl to the vertical depth of a car sill and adapted to rest upon and be secured to the outer end of the car bolster', the outer end thereof extending outwardly of the bolster end and a side-sill supporting arm extending from the outer end of the bracket body at the lower side thereof, the main body of said extension bracket having a transverse groove in its upper surface at each end adapted to receive tension truss rods.

3. The combination with a car bolster having a centrally positioned horizontal upper surface for the reception of central car sills'and extending at each end beyond the sill seatingsection, extension brackets having horizontal upper surfaces and adapted to be secured upon the outer ends of said bolsters with their inner ends engaging the central car sills, and of a vertical thickness corresponding with the vertical depth of the car sills and a bunk resting upon and secured to the upper surface of the extension brackets and with said brackets and the bolster forming a truss having a recess for the reception of the central car sills.

4. rlhe combination with a car bolster having a level top and having a side bearing surface at each end, a. bracket extension adapted to be secured upon each end of the bolster having the'upper surface of its main body parallel with and above .the upper surface of the bolster an amount correspending` with the depth of the car sills, said bracket extensions having a side-sill supporting arin projecting from its outer end, and a bunk resting upon and secured to said extension brackets and with said brackets and the bolster forming sill-receiving recesses between them. y y

5. The combinationy with a car bolster, extension brackets secured upon the outer ends thereof and having their inner ends which overlap the bolster of a vertical depth corresponding with the depth of the central car sills, the upper surface of said extension brackets being horizontal and extending outwardly to the car side sills, said exten-` sion brackets having an integral sill supporting arni extending under the car side sill, and a metal log bunk rigidly secured to the top surfaces of the bracket extensions and extending over the car side sills.

Signed at Seattle, King County, Washington, this 30th day of June7 1922.

FREDERICK W. CHRISVLL, 

